IBM WebSphere Application Server: Increased Privileges -- Existing Account

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256

===========================================================================
             AUSCERT External Security Bulletin Redistribution

                               ESB-2017.0654
         Security Bulletin: Privilege Escalation Vulnerability in
               WebSphere Application Server (CVE-2017-1151)
                               14 March 2017

===========================================================================

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           IBM WebSphere Application Server
Publisher:         IBM
Operating System:  AIX
                   HP-UX
                   IBM i
                   Linux variants
                   Solaris
                   Windows
                   iOS
                   z/OS
Impact/Access:     Increased Privileges -- Existing Account
Resolution:        Patch/Upgrade
CVE Names:         CVE-2017-1151  

Reference:         ESB-2017.0652

Original Bulletin: 
   http://www.ibm.com/support/docview.wss?uid=swg21999293

- --------------------------BEGIN INCLUDED TEXT--------------------

Security Bulletin: Privilege Escalation Vulnerability in WebSphere
Application Server (CVE-2017-1151)

Document information

More support for: WebSphere Application Server

Software version: 8.0, 8.5, 8.5.5, 9.0

Operating system(s): AIX, HP-UX, IBM i, Linux, Solaris, Windows, iOS, z/OS

Software edition: Base, Developer, Express, Network Deployment

Reference #: 1999293

Modified date: 13 March 2017

Security Bulletin

Summary

There is a potential privilege escalation vulnerability in traditional
WebSphere Application Server when using the OpenID Connect (OIDC) Trust
Association Interceptor (TAI). This does not affect WebSphere Application
Server Liberty.

Vulnerability Details

CVEID: CVE-2017-1151
DESCRIPTION: IBM WebSphere Application Server configured with OpenID
Connect (OIDC) Trust Association Interceptor (TAI) could allow a user to
gain elevated privileges on the system.
CVSS Base Score: 8.1
CVSS Temporal Score: See
https://exchange.xforce.ibmcloud.com/vulnerabilities/122292 for the
current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H)

Affected Products and Versions

This vulnerability affects the following versions and releases of IBM
WebSphere Application Server:
Version 9.0
Version 8.5
Version 8.0

Remediation/Fixes

The recommended solution is to apply the interim fix, Fix Pack or PTF
containing APAR PI74857 for each named product as soon as practical. NOTE:
If you are operating in a cluster, the interim fix must be applied to each
cluster member.

For WebSphere Application Server traditional and WebSphere Application
Server Hypervisor edition:

For V9.0.0.0 through 9.0.0.3 traditional:
 Upgrade to minimal fix pack levels as required by interim fix and then
apply Interim Fix PI74857
- --OR--
 Apply Fix Pack 9.0.0.4 or later (targeted availability 23 June 2017).

For V8.5.5.3 through 8.5.5.11 traditional:
 Upgrade to minimal fix pack levels as required by interim fix and then
apply Interim Fix PI74857
- --OR--
 Apply Fix Pack 8.5.5.12 or later (targeted availability 04 August 2017).

For V8.0.0.10 through 8.0.0.13 traditional:
 Upgrade to minimal fix pack levels as required by interim fix and then
apply Interim Fix PI74857
- --OR--
 Apply Fix Pack 8.0.0.14 or later (targeted availability 16 October 2017).

REMINDER: If you are operating in a cluster, the interim fix must be
applied to each cluster member.

Workarounds and Mitigations

Change the value for the com.ibm.websphere.security.InvokeTAIbeforeSSO
custom property to not include the OIDC TAI class name:
com.ibm.ws.security.oidc.client.RelyingParty. This property can be updated
from the Administrative Console > Global Security > Custom Properties
panel. When InvokeTAIbeforeSSO is not enabled for the OIDC TAI class,
the timeout for the user login will be that of the LTPA token.

For more information about changing custom
properties please refer to the knowledge center:
https://www.ibm.com/support/knowledgecenter/SSAW57_9.0.0/com.ibm.websphere.nd.multiplatform.doc/ae/tsec_custprop_del.html
Get Notified about Future Security Bulletins

Subscribe to My Notifications to be notified of important product support
alerts like this.

Important note

IBM strongly suggests that all System z customers be subscribed to the
System z Security Portal to receive the latest critical System z security
and integrity service. If you are not subscribed, see the instructions
on the System z Security web site. Security and integrity APARs and
associated fixes will be posted to this portal. IBM suggests reviewing
the CVSS scores and applying all security or integrity fixes as soon as
possible to minimize any potential risk.

References
Complete CVSS v3 Guide
On-line Calculator v3

Related information
IBM Secure Engineering Web Portal
IBM Product Security Incident Response Blog

Change History

10 March 2017: original document published

*The CVSS Environment Score is customer environment specific and will
ultimately impact the Overall CVSS Score. Customers can evaluate the impact
of this vulnerability in their environments by accessing the links in the
Reference section of this Security Bulletin.

Disclaimer

According to the Forum of Incident Response and Security Teams (FIRST), the
Common Vulnerability Scoring System (CVSS) is an "industry open standard
designed to convey vulnerability severity and help to determine urgency
and priority of response." IBM PROVIDES THE CVSS SCORES "AS IS" WITHOUT
WARRANTY OF ANY KIND, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
FITNESS FOR A PARTICULAR PURPOSE. CUSTOMERS ARE RESPONSIBLE FOR ASSESSING
THE IMPACT OF ANY ACTUAL OR POTENTIAL SECURITY VULNERABILITY.

- --------------------------END INCLUDED TEXT--------------------

You have received this e-mail bulletin as a result of your organisation's
registration with AusCERT. The mailing list you are subscribed to is
maintained within your organisation, so if you do not wish to continue
receiving these bulletins you should contact your local IT manager. If
you do not know who that is, please send an email to auscert@auscert.org.au
and we will forward your request to the appropriate person.

NOTE: Third Party Rights
This security bulletin is provided as a service to AusCERT's members.  As
AusCERT did not write the document quoted above, AusCERT has had no control
over its content. The decision to follow or act on information or advice
contained in this security bulletin is the responsibility of each user or
organisation, and should be considered in accordance with your organisation's
site policies and procedures. AusCERT takes no responsibility for consequences
which may arise from following or acting on information or advice contained in
this security bulletin.

NOTE: This is only the original release of the security bulletin.  It may
not be updated when updates to the original are made.  If downloading at
a later date, it is recommended that the bulletin is retrieved directly
from the author's website to ensure that the information is still current.

Contact information for the authors of the original document is included
in the Security Bulletin above.  If you have any questions or need further
information, please contact them directly.

Previous advisories and external security bulletins can be retrieved from:

        http://www.auscert.org.au/render.html?cid=1980

===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072

Internet Email: auscert@auscert.org.au
Facsimile:      (07) 3365 7031
Telephone:      (07) 3365 4417 (International: +61 7 3365 4417)
                AusCERT personnel answer during Queensland business hours
                which are GMT+10:00 (AEST).
                On call after hours for member emergencies only.
===========================================================================
-----BEGIN PGP SIGNATURE-----
Comment: http://www.auscert.org.au/render.html?it=1967
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=ZJdF
-----END PGP SIGNATURE-----